Loudspeaker were fixed in the hall so that everyone （）an opportunity to hear the speech.
问题描述：
Loudspeaker were fixed in the hall so that everyone （）an opportunity to hear the speech.
A.ought to have B.Must have C.may have D.Should have
在星火的词汇与语法书里选的是c,在星火真题里面有说是D,正确答案到底是哪一个
答
D.从were可以看出是过去式,所以may绝对不对.从意思上来看,AB也不对,只能选D.为什么是过去时就不能用maymay是原形，用在现在时里面。如果是过去式必须用might。